wiring question

OOk

Ok, I checked the continuity and it appears that the amp gauge is bad the display on the multimeter didn't change. So can I use these wires and pigtail them to an aftermarket amp gauge without any issues? I am not really wanting to tear into the cluster just to replace the factory gauge.k

Connecting the black and red to each other bypasses the amp gauge, and is probably why yours were done that way.
Keep in mind that if you decide to swap the gauge for a voltmeter that you can’t connect it the same way.
The volt meter will have to get it’s 12v supply from a switched ignition source for the positive and it’s ground from the cluster or dash metal.